Air Fryer Green Bean and Bacon Casserole

Air Fryer Green Bean and Bacon Casserole is my go-to when I want that classic creamy, savory holiday side without tying up my oven. The green beans stay crisp-tender while the creamy mushroom sauce coats every piece, and the bacon on top gets perfectly crispy instead of soggy. The air fryer makes everything bubbly and hot in no time. It's perfect for Thanksgiving, Christmas, Easter, and any holiday gathering or potluck because it frees up your oven and reheats beautifully. Leftovers keep in the fridge for up to 3 days.

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Prep Time: 10

Cook Time: 22

Total Time: 32

Course: casserole, Side Dish

Cuisine: American

Keyword: Air Fryer Green Bean and Bacon Casserole

Servings:

Calories: 222kcal

Author: Mandy Applegate

Ingredients

2 tablespoons butter
2 cloves garlic minced
½ cup onion finely diced
2 cups button mushrooms sliced
3 cups fresh green beans trimmed and halved
3 cups chicken broth
1 cup cream of mushroom soup
¼ cup grated Parmesan cheese
Salt and pepper to taste
½ cup crispy bacon pieces
Crispy onion strings for topping

US Customary - Metric

Instructions

In a large skillet, melt the butter over medium heat. Add the onions and garlic, and sauté until softened. Stir in the mushrooms and cook for another 1–2 minutes. Remove from heat.
2 tablespoons butter, 2 cloves garlic, ½ cup onion, 2 cups button mushrooms
In a medium saucepan, bring the green beans and chicken broth to a boil. Cook for 8 minutes, until the beans are crisp-tender. Drain well.
3 cups fresh green beans, 3 cups chicken broth
Lightly grease a 2-quart baking dish.
In a large bowl, combine the cream of mushroom soup, sautéed vegetables, cooked green beans, half the Parmesan, salt, and pepper. Mix until everything is well coated.
1 cup cream of mushroom soup, ¼ cup grated Parmesan cheese, Salt and pepper
Transfer the mixture to an air fryer–safe baking dish (make sure it fits inside your air fryer basket). Sprinkle the remaining Parmesan on top.
Air fry at 350°F (180°C) for 10–12 minutes, or until the casserole is heated through and bubbling around the edges.
Remove carefully, then top with crispy bacon and crispy onions before serving.
½ cup crispy bacon pieces, Crispy onion strings

Notes

Use fresh green beans if possible: Fresh green beans hold their texture better than frozen. If you use frozen, thaw them and pat them dry first to remove extra moisture.
Don't skip draining the green beans: After blanching, make sure you drain them really well in a colander. Excess liquid will make the casserole watery and prevent the cheese from getting crispy on top. Pat them dry with a paper towel if needed.
Customize your ingredients: Use thick-cut bacon or thick cut bacon slices for better texture and crispier pieces, swap regular green beans for French green beans (reduce blanching to 5-6 minutes), season generously with black pepper for a nice bite, and use a pan with high sides when sautéing the mushrooms for a couple of minutes until they release moisture.
Check your dish size: Make sure your baking dish fits inside your air fryer basket with at least half an inch of clearance on all sides for proper air circulation. A 2-quart dish works perfectly in most standard air fryers.
Add toppings at the end: The bacon and crispy onions should go on right before serving. If you add them before air frying, they'll get soggy from the steam.
Flash-freeze for meal prep: If you're making this ahead, assemble the casserole in its entirety and freeze it on a baking sheet for 1 hour before wrapping it tightly. This prevents the ingredients from shifting and makes it easier to store flat in your freezer.

Nutrition

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